Method and device for acquiring resource for uplink control channel in wireless communication system

Abstract

Provided are a method and device for acquiring a PUCCH (physical uplink control channel) resource index in a wireless communication system. A terminal acquires a PUCCH resource index indicating a dynamic PUCCH region corresponding to an e-PDCCH (enhanced physical downlink control channel). The PUCCH resource index is acquired based on the smallest CCE (control channel element) index wherein the e-PDCCH is allocated, and a first dynamic PUCCH region corresponding to the e-PDCCH is not overlapped with the dynamic PUCCH region corresponding to PDCCH.

What is claimed is: 
     
       1. A method for acquiring, by a user equipment, a physical uplink control channel (PUCCH) resource index in a wireless communication system, the method comprising:
 acquiring a PUCCH resource index indicating a first dynamic PUCCH region corresponding to an enhanced physical downlink control channel (e-PDCCH); and 
 transmitting an acknowledgement/non-acknowledgement (ACK/NACK) signal to a base station based on the acquired PUCCH resource index, 
 wherein the PUCCH resource index is acquired based on the smallest control channel element (CCE) index to which the e-PDCCH is allocated, and 
 wherein the first dynamic PUCCH region corresponding to the e-PDCCH is not overlapped with a second dynamic PUCCH region corresponding to a PDCCH. 
 
     
     
       2. The method of  claim 1 , wherein the first dynamic PUCCH region is allocated in a static PUCCH format 1/1a/1b region. 
     
     
       3. The method of  claim 2 , wherein the first dynamic PUCCH region is allocated in a direction in which an index is increased from a start point of the static PUCCH format 1/1a/1b region. 
     
     
       4. The method of  claim 2 , wherein the first dynamic PUCCH region is allocated in a direction in which an index is increased from an index separated from a start point of the static PUCCH format 1/1a/1b region by an offset. 
     
     
       5. The method of  claim 2 , wherein the first dynamic PUCCH region is allocated in a direction in which an index is decreased from an end point of the static PUCCH format 1/1a/1b region. 
     
     
       6. The method of  claim 2 , wherein the first dynamic PUCCH region is allocated in a direction in which an index is increased from an index separated from an end point of the static PUCCH format 1/1a/1b region by the offset. 
     
     
       7. The method of  claim 1 , wherein the e-PDCCH is allocated to a data region in a subframe. 
     
     
       8. The method of  claim 1 , wherein the PUCCH resource index is acquired based on an offset. 
     
     
       9. The method of  claim 8 , wherein the offset is applied to the smallest CCE index to which the e-PDCCH is allocated. 
     
     
       10. The method of  claim 8 , wherein the offset is applied to a search space to which the e-PDCCH is transmitted. 
     
     
       11. The method of  claim 8 , wherein the offset is applied to a variable Y k  for determining a search space to which the e-PDCCH is transmitted. 
     
     
       12. The method of  claim 8 , wherein the offset is 1. 
     
     
       13. The method of  claim 8 , wherein the offset is applied when the smallest CCE index to which the e-PDCCH is allocated or an aggregation level is an even number. 
     
     
       14. A user equipment (UE) for acquiring a physical uplink control channel (PUCCH) resource index in a wireless communication system, the UE comprising:
 a radio frequency (RF) for unit transmitting or receiving a radio signal; and 
 a processor connected to the RF unit, and configured to: 
 acquire a PUCCH resource index indicating a first dynamic PUCCH region corresponding to an enhanced physical downlink control channel (e-PDCCH); and 
 transmit an acknowledgement/non-acknowledgement (ACK/NACK) signal to a base station based on the acquired PUCCH resource index, 
 wherein the PUCCH resource index is acquired based on the smallest control channel element (CCE) index to which the e-PDCCH is allocated, and 
 wherein the first dynamic PUCCH region corresponding to the e-PDCCH is not overlapped with a second dynamic PUCCH region corresponding to a PDCCH.